on December 26, 2022
NumPy ValueError: operands could not be broadcast together with shapes (1,2) > (1678,2218)
Geographic Information SystemsWhere operands could not be broadcast together with shapes? How to Fix: ValueError: operands could not be broadcast together with shapes. This error occurs when you attempt to perform matrix multiplication using a multiplication sign (*) in Python instead of the numpy. dot() function. How does broadcasting work in NumPy? The term broadcasting describes how
on December 26, 2022
Mouse Scroll in ArcGIS different from that of Google Maps?
Geographic Information SystemsHow do I change the mouse scroll in Arcgis? Changing the Zoom of the Mouse Wheel To accomplish this, go to “Customize”, click “ArcMap Options”, and then click “General Tab.” Near the bottom of the dialog, there is an option to “Roll Forward/ Drag Up to Zoom” in or out of the map. How do
on December 26, 2022
Intersecting polygons in Oracle
Geographic Information SystemsWhat is an intersecting polygon? Self-intersecting polygons, crossed polygons, or self-crossing polygons are polygons some of whose edges cross each other. They contrast with simple polygons, whose edges never cross. How do you intersect two polygons? Intersection of Convex Polygons Algorithm Create an empty polygon as P. Add all corners of Polygon1 that is inside
on December 26, 2022
3D GIS Mapping over Web
Geographic Information SystemsHow do I make a 3D map in ArcGIS online? Quote from video: To start using 3d maps in arcgis. Online go to the website arcgis.com and click on scene. Close the default splash screen so that you can start to use the globe. Does ArcGIS online have 3D capabilities? ArcGIS Online includes interactive maps
on December 26, 2022
Creating Vector layer from selected features with PyQGIS
Geographic Information SystemsHow do I create a shapefile from selected features in QGIS? Once the features have been selected, right click on your dataset and select the “save as” option from the menu. From the interface select the desired file format. Under encoding click the “Save only selected features” box. Click “Browse”and designate the file name and
on December 26, 2022
QGIS swaps(?) attribute tables of PostGIS layers
Geographic Information SystemsHow do I add a PostGIS layer to QGIS? Open QGIS, select Layer -> Add layer -> Add PostGIS layers, it should open the interface to connect a PostGIS table. 2. In the dialogue, click “New”, it should open the dialogue to configure the PostGIS server, and database (nyc1). Enter relevant information in Step 3,
on December 26, 2022
Tools to identify shape of polygon?
Geographic Information SystemsWhat is the shapes tool? Shape tools are used to create vector shapes & paths. The following are the shape tools available in Adobe Photoshop: Rectangle Tool – To create a rectangle or square. Rounded Rectangle – To create a rectangle or a square with rounded corners. Ellipse – To create an ellipse (oval) or
on December 26, 2022
Calculating Accuracy Assessment in QGIS?
Geographic Information SystemsHow to do accuracy assessment in QGIS? 3.4.5.1.1. Accuracy assessment¶ Select the classification to assess : select a classification raster (already loaded in QGIS); : refresh layer list; Select the reference vector or raster : select a raster or a vector (already loaded in QGIS), used as reference layer (ground truth) for the accuracy assessment;
on December 26, 2022
Geometry checker not removing overlap between features
Geographic Information SystemsHow do I remove overlapping polygons in QGIS? You can use the ‘Check Geometries’ plugin (Vector/Geometry Tools/Check Geometries) to remove overlapping areas. Save this answer. How do I fix geometry in QGIS? QGIS comes with a built-in algorithm to fix geometry errors automatically. Search for and locate the Vector geometry ‣ Fix geometries algorithm. Double-click
on December 26, 2022
How to enable tracing in QGIS 3 beyond applications for adding polygon purposes?
Geographic Information SystemsHow do I trace a polygon in Qgis? To use the tool, simply enable Trace Digitizing and click on / snap to a vertex or segment of an existing feature you wish to trace along. You can now hover the mouse pointer along various features and the red rubber band will indicate the proposed trace